Which one of the following is NOT an email service?

Correct option is B

Bing is a search engine developed by Microsoft, not an email service. The other options—ProtonMail, Yahoo Mail, and Gmail—are all popular email services used for sending and receiving electronic messages.

Important Key Points:

1. ProtonMail: A secure and privacy-focused email service.
2. Yahoo Mail: One of the earliest and widely used email services.
3. Gmail: A free email service by Google with advanced features like spam filtering and large storage.
4. Bing: A search engine, not related to email functionality.

Knowledge Booster:

1. Other Popular Email Services: Include Outlook, Zoho Mail, and iCloud Mail.
2. Email Protocols: Commonly used protocols are IMAP, POP3, and SMTP for sending and receiving emails.
3. Secure Email Services: ProtonMail and Tutanota are known for providing end-to-end encryption.